Boulud’s company, The Dinex Group, claims Duke’s is trying to “create confusion” and “trade on the good will and reputation” of Boulud, whose empire also includes the highly acclaimed Daniel and Cafe Boulud.

Court papers also note that a lawyer for Duke’s promised last year to stop using the initials, but that Duke’s is still “prominently using the ‘DBGB’ designation in various manners.”